Thoughts of an infinite being. limitless or endless in space, extent, or size; impossible to measure or calculate. "the infinite mercy of God" synonyms: boundless, unbounded, unlimited, limitless, without limit, without end, never-ending, interminable, cosmic; More measureless, immeasurable, fathomless, unfathomed, bottomless; extensive, vast "the universe is spatially infinite" countless, uncountable, inestimable, indeterminable, innumerable, numberless, immeasurable, incalculable, untold, very many; great, vast, enormous, immense, prodigious, multitudinous;